25. Rita Ora – How We Do

British singer Rita Ora attends the Soiree Chopard 'Mystery Party' on the sidelines of the 65th Cannes film festival on May 21, 2012 in Cannes. AFP PHOTO / LOIC VENANCE (Photo credit should read LOIC VENANCE/AFP/GettyImages)

24. Drake – The Motto

IRVINE, CA - MAY 08: Singer Drake performs at The Verizon Wireless Amphitheatre on May 8, 2012 in Irvine, California. (Photo by Kevin Winter/Getty Images)

23. Pitbull – Back In Time

NEW YORK, NY - MAY 23: Pitbull attends the "Men In Black 3" New York Premiere at Ziegfeld Theatre on May 23, 2012 in New York City. (Photo by Stephen Lovekin/Getty Images)

22. David Guetta - Titanium

HOLLYWOOD, CA - APRIL 18: Two time Grammy Award Winner, singer, songwriter David Guetta arrives at the 2012 ASCAP POP Music Awards at the Hollywood Renaissance Hotel on April 18, 2012 in Hollywood, California. (Photo by John M. Heller/Getty Images)

21. One Direction – One Thing

NEW YORK, NY - MAY 23: (Left to right) Singers Zayn Malik, Harry Styles, Liam Payne, Louis Tomlinson, and Niall Horan of One Direction attend the "Men In Black 3" New York Premiere after party at the USS Intrepid on May 23, 2012 in New York City. (Photo by Stephen Lovekin/Getty Images)

20. Ellie Goulding - Lights

HOLLYWOOD, CA - APRIL 11: Singer Ellie Goulding attends the Third Annual ELLE Women In Music Event at Avalon on April 11, 2012 in Hollywood, California. (Photo by Michael Buckner/Getty Images)

19. Rihanna – Where Have You Been

LOS ANGELES, CA - MAY 23: Singer Rihanna performs onstage during Fox's "American Idol 2012" results show at Nokia Theatre L.A. Live on May 23, 2012 in Los Angeles, California. (Photo by Mark Davis/Getty Images)

18. Flo Rida – Good Feelin

NEW YORK, NY - MAY 21: Flo Rida attends OK! Magazine Sexy Singles Party In New York City on May 21, 2012 in New York City. (Photo by Theo Wargo/Getty Images for Ok! Magazine)

17. Pitbull ft. Chris Brown – International Love

LAS VEGAS, NV - MAY 20: Singers Monica and Chris Brown arrive at the 2012 Billboard Music Awards held at the MGM Grand Garden Arena on May 20, 2012 in Las Vegas, Nevada. (Photo by Frazer Harrison/Getty Images for ABC)

16. Gavin DeGraw – Not Over You

LAS VEGAS, NV - MAY 20: Singer Gavin Degraw arrives at the 2012 Billboard Music Awards held at the MGM Grand Garden Arena on May 20, 2012 in Las Vegas, Nevada. (Photo by Frazer Harrison/Getty Images for ABC)

15. Maroon 5 - Payphone

CHICAGO, IL - MARCH 01: Adam Levine and James valentine of Maroon 5 perform at Escape To Total Rewards at Union Station on March 1, 2012 in Chicago, Illinois. (Photo by Tasos Katopodis/Getty Images for Caesars Entertainment)

14. Demi Lovato – Give Your Heart a Break

US singer Demi Lovato performs under heavy rain in Montevideo during her A Special Night tour on April 29, 2012. AFP PHOTO/Pablo PORCIUNCULA (Photo credit should read PABLO PORCIUNCULA/AFP/GettyImages)

13. Fun. – We Are Young

INDIO, CA - APRIL 17: Singer Nate Ruess of fun. performs during Day 3 of the Coachella Valley Music & Arts Festival 2011 held at the Empire Polo Club on April 17, 2011 in Indio, California. (Photo by Karl Walter/Getty Images)

12. K’Naan – Anbody Out There

HOLMDEL, NJ - MAY 20: K'naan performs onstage at 103.5 KTU's KTUphoria at PNC Bank Arts Center on May 20, 2012 in Holmdel City, New Jersey. (Photo by Brian Ach/Getty Images)

11. Usher - Scream

American recording artist and actor Usher poses upon arrival at the Palais des Festivals to attend the 12th Annual NRJ Music Awards on January 22, 2011 in Cannes, south eastern France. AFP PHOTO VALERY HACHE (Photo credit should read VALERY HACHE/AFP/Getty Images)

10. Karmin – Brokenhearted

HOLMDEL, NJ - MAY 20: Amy Heidemann of Karmin performs onstage at 103.5 KTU's KTUphoria at PNC Bank Arts Center on May 20, 2012 in Holmdel City, New Jersey. (Photo by Brian Ach/Getty Images)

9. Flo Rida – Wild Ones

HOLMDEL, NJ - MAY 20: Flo Rida performs at 103.5 KTU's KTUphoria at PNC Bank Arts Center on May 20, 2012 in Holmdel City, New Jersey. (Photo by Brian Ach/Getty Images)

8. Havanna Brown ft Pitbull – We Run The Night

HOLMDEL, NJ - MAY 20: Pitbull performs onstage at 103.5 KTU's KTUphoria at PNC Bank Arts Center on May 20, 2012 in Holmdel City, New Jersey. (Photo by Brian Ach/Getty Images)

7. Nicki Minaj – Starships

CARSON, CA - MAY 12: Singer Nicki Minaj performs at 102.7 KIIS FM's Wango Tango at The Home Depot Center on May 12, 2012 in Carson, California. (Photo by Kevin Winter/Getty Images)

6. Carly Rae Jepsen – Call Me Maybe

LAS VEGAS, NV - MAY 20: Singer Carly Rae Jepsen arrives at the 2012 Billboard Music Awards held at the MGM Grand Garden Arena on May 20, 2012 in Las Vegas, Nevada. (Photo by Frazer Harrison/Getty Images for ABC)

5. One Direction –What Makes You Beautiful

NEW YORK, NY - MAY 23: (L-R) Zayn Malik, Niall Horan, Harry Styles, Louis Tomlinson and Liam Payne of One Direction attend the "Men In Black 3" New York Premiere at Ziegfeld Theatre on May 23, 2012 in New York City. (Photo by Stephen Lovekin/Getty Images)

4. Taylor Swift – Eyes Open

LAS VEGAS, NV - MAY 20: Singer Taylor Swift, winner of the Woman of the Year award, poses in the press room at the 2012 Billboard Music Awards held at the MGM Grand Garden Arena on May 20, 2012 in Las Vegas, Nevada. (Photo by Frazer Harrison/Getty Images for ABC)

3. The Wanted – Glad You Came

LAS VEGAS, NV - MAY 20: (L-R) Nathan Sykes, Jay McGuiness, Siva Kaneswaran, Tom Parker and Max George of The Wanted arrive at the 2012 Billboard Music Awards held at the MGM Grand Garden Arena on May 20, 2012 in Las Vegas, Nevada. (Photo by Frazer Harrison/Getty Images for ABC)

2. Train – Drive By

LAS VEGAS, NV - OCTOBER 29: Singer Patrick Monahan of Train performs onstage during the Andre Agassi Foundation for Education's 16th Grand Slam for Children benefit concert at the Wynn Las Vegas on October 29, 2011 in Las Vegas, Nevada. The event raises funds to help improve education for underserved youth in the Las Vegas community. (Photo by Ethan Miller/Getty Images)

1. Gotye – Somebody I Used To Know

INDIO, CA - APRIL 15: Musician Wouter "Wally" De Backer aka Gotye performs during Day 3 of the 2012 Coachella Valley Music & Arts Festival held at the Empire Polo Club on April 15, 2012 in Indio, California. (Photo by Michael Buckner/Getty Images for Coachella)